Waste incineration power plant leachate treatment system and treatment method

Abstract

The invention discloses a waste incineration power plant leachate treatment system and treatment method. The system comprises an adjusting tank, an anaerobic device, an anaerobic water production tank, an AMBR membrane device, a membrane advanced treatment device and a water producing tank, and further comprises a sludge tank and a concentrated solution collecting tank; the anaerobic device and the AMBR membrane device are connected with the sludge tank through pipelines respectively, and the membrane advanced treatment device is connected with the concentrated solution collecting tank througha pipeline. The system and method have the advantages that the yield of the concentrated solution is low, the technological process is short, ammonia nitrogen in leachate is recycled as a denitrationreducing agent after being concentrated and enriched, the pollutant treatment cost is reduced, resource recovery is achieved, and material consumption in the flue gas denitration stage is reduced.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a leachate treatment system and treatment method of a garbage incineration power plant. Background technique [0002] Garbage leachate is high-concentration organic wastewater produced in solid waste treatment projects. Among them, the leachate of domestic waste incineration plants is the waste water collected from waste storage pits in domestic waste incineration plants. It has high pollutant concentration, water quality, and water volume. It has the characteristics of large fluctuation, high hardness and high alkalinity. COD in common waste incineration plants Cr , ammonia nitrogen, TN and SS concentrations are 40000-70000mg / L, 1200-2500mg / L, 1300-3000mg / L and 3000-10000mg / L respectively, and the pH value is generally acidic. [0003] At present, the leachate treatment of domestic waste incineration plants basically needs to meet the zero discharge standard, an...

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Problems solved by technology

The process is mature, the operation is stable, and the quality of the effluent can reach the standard. However, the process will produce a 25%-40% concentrate, and the concentrate produced by advanced treatment will be coordinated through lime pulping, fly ash chelation, and furnace backspraying. However, due to the large output of the concentrate, it is difficult to coordinate the consumption. As for the evaporation process of the concentrate, the investment and operation cost of the evaporation system are large, and it is not economically feasible.

In addition, since the removal of organic pollutants and ammonia nitrogen by the aerobic system requires a large amount of oxygen supply to microorganisms, the aerobic system consumes a lot of energy and has high operating costs.

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